NORTH AMERICAN PARASITIC EXf)A.SCE.E. ioc> 



ExOASCUS AMENTORUINI Sdiicbfck. Plate II. Fig. 2. 



Bibl. and Syn. : 

 Jixocisciis a/ni/onjiiii^ var. ahii-incaiiic Kiihn "73. 

 Tap/iriiKi ahiiliinjna Auct. Amcr. 



Farlow '78. RoliiiiNon '87. 



Peck '83. Ellis -89. 



J^.\V(7sr//s abii De By., \ar. >irohilina Thunien '79. 



Rehni. '81. 



Ascoiu\cc:> tosqiiiiictii Auct. Ainer. 



Ellis "79. Ilarkncss "85. 



Farlow '8,V 



J£.\oa<('iis aliiilorijniis Auct. i\.iner. 



Arthur cV II<)l\va\- '87. Saccardo '8y. 



Exoai'ciiS' ainctiloniin Sadebeck. 



Farlow iS: .St'\nioi.ir '9J. 

 Sadebeck '93. 



Taphriua ahij-i)ica)uc (Kiihn) Magnus. 



Farlow iS: Sevnioiir '9;). 

 Economic Fiinyi '92. 



Taplinitd aiuciilontiu ( Sadcb. ) Briosi e Cavara "91. 



This species causes tiie very common affection of bracts 

 subtending the fertile catkins of Abuts incana, Alniis ccrnilata 

 and AIiiiis rubra, causing them to become enlarged and 

 twisted, and when mature covered by escaping spores as with 

 a hoary frost. The mycelium is perennial. The asci borne 

 upon all parts of the bracts are densely crowded together, 

 measuring 9-10x35-41,", clavate in outline. \\\\\\ sometimes 

 slightly flattened apices; there are no stalk-cells: the spores 

 are from 4-5," in diameter, with seldom any conidial forma- 

 tions. I have examined Ahiiis iiicaiia from Newton. Mass.. 

 collected by Ur. W. G. Farlow: from Plainville. Conn., and 

 Granville. ?klass., bv Mr. A. B. Sevmour; also A/niis serrii- 

 lala from Auburn, Ala., collected bv Prof. G. F. Atkinson, 

 iind from Jamaica Plain, Mass., by Mr. A. B. Se^■mour. 



